According to China Food News Network, the Blue Book of the Fourth Nutrition Meal aims to improve the health literacy and nutritional level of the elderly, which is a project implemented by the Chinese Society of Gerontology and Geriatrics. With the acceleration of population aging, the nutrition and health problems of the elderly have been paid more and more attention. The Blue Book of Nutrition Fourth Meal popularizes nutrition knowledge to the elderly through scientific and practical contents, and helps them improve their eating habits and lifestyles, thus improving their quality of life.